Mounting



Patented Nov. 22, 1938 l 1 UNITED; STA-FES GFF-[CE alavesa. j I

MoUN'rING Frederick A. Fowler, Nevada city... Calif. Applcationdanuaryf 24, 1938; SerialiNo. 186,692 4. (01.] 25e-53)` MyV inventionrelatesto mountings and-more ing in xed position between the walls ofthe particularly to pneumatic drill mountings. drift. l y Y Pneumatic drills', particularly rock, drills,l are Another object of my invention is to prov-ide usually supported within thedrift between the ai mounting `of the above described character 5 Hoor and ceiling thereof-by means of-a mounting; capable of adjustment `01 Supporting n dill 'I-'he mounting usually comprises acolumn or Within narrow` as well as relatively wide drifts. cylinder equippedwith a piston havingv a piston A furtherobject oflmy invention is to provide a and pistonV rod. One endV of the piston rod is mounting ofthe above described character which fashioned with means for holding one endofl is simple-in construction, efficient in operation, l theemounting in engagement with the ceilingof easy-ofv attachment, durable in use and economl0 the'drift, whiletheoppositely disposed end ofthe ical in manufacture.V f f cylinder is fashioned for engagement with the Other objects and adveintngeS Willbe apparent iloor of the drift. Compressed air is usually from the following'description, appended claims introduced into the cylinder to cause relative and annexeddrawing.v i i l .movement of the piston and cylinder to-eect a Referringrto the drawingV wherein like reference l5 clampingof the mounting between the floor and characters designate likev parts throughout `the ceiling. Mounted on the cylinder, intermediate SeVel-'al Views: i

of the ends thereof, is a work armv adapted to Fig. lis a vertical'section'ofmyinvention:V l support a drill in operating position. In the oper- Fig; 2 is-asideelevation of the ceiling engaging ation of the drill, the sameis moved on thelwork member; i I zo arm and away fromthe cylinder thereby greatly Fig. 3 is a side elevation, partly in section,l illusirlcreasing the torque on the cylinder. This intrating a pair of' the ceiling engagingY members crease in the torque results in a twisting or turn- COIlneCted tOgetheI and adapted' GT use iIl` C011- irlg of the cylinder and as a consequence the drill nection with wide drifts.

is moved away from the work andivrendered use- In practicing my invention `I provide a' casing 25 less. when this undesirable result occurs con- 5'cfeho1-Icw construction having secured tothe siderable time and labor is required to repositiorr lower' end thereof a reducing coupling 6', said the mounting and drill for further operation; coupling being secured to said'Y casingbv means Examples of drill structures ofthe aforismen Oiflwelding as at 1. The enlarged'y Section ofseid so tioned character are disclosed in the United Coupling is internally' threaded and; receives :it states Patents Nos. l,4l8;336 and 1,954,957. therein the upper end of a cvlinder. YSet Screws Due to the limited space within the; drift, it is 9 serve to maintainft'lleN Cylinder in locked relanecessary to construct thel drill mounting of the 171011 With the COllPlllgsmallest size feasible, particularly the cylinder The lower end of the cylinder 8 is 'securedv Withorv supporting column on which the work arm in a recessof a Cylinder head landis welded is mounted. As a, consequence, so-farV as I have therein as atA I l. The lower face of the-head l!) been able to ascertain and with reference tothe iS fastened With a Dlulilty 0f teeth I2 adapted above noted patents, the cylinders or columns t0 engage'the floor I310 a drift. are of a relatively small diameter' whereby only Within the Cylinder 3 there iS Sldably mOllllted 40 a minimum amount of oor area is engaged by a DStn I4 Selled about the 10We1 end' 0f a :to thehead of the cylinder and which amcunt'is not piston rod I5 fashioned with allongitudinally exsucient to appreciably counteract a torque tending bore throughout the length thereof. The transmitted to the cylinder by the drill through piston rod I5 extendsy upwardly through the the medium of the work arm. Y casing 5 and has-secured on the upper end thereof To counteract the effect of the torque I have a ceilingengaging member 4I6 Vadapted to engage 45 discovered that it is essential to increase the licor the Ceiling I7 Of the driftengaging surfaceof the cylinderwithout increas- A work armV |81is rigidly Secured te the Casing ing the normal or standard diameter of the 5 between the upper end thereof and the coupling column ch which the work arm is mounted. 6 and ediustably supports thereon a drill (not 5o It is therefore one cf the principal objects of shown) for operation Within the drift; .The `lipeo my invention to provide a mounting equipped per end of the casing 5 has securedthereon a with'means for engaging thewall of a drift and rubber dirt shield Ill` centrally apeituled 01 so constructed and arranged to counteract torque receiving the end of the piston rod I5. and twist transmitted to the mounting by the The ceiling engaging member I6 comprises an action of a drill and thereby maintain the mountelongated sleeve formed with a central aperture 55 vof the sleeve.

2U communicating with the interior of the piston rod I5. Said sleeve is fashioned on the outer periphery thereof with a circumferentially extending shoulder 2I engaging the upper edge of the rod I5 whereby the lower portion of said sleeve is maintained within the bore of the rod I5. The upper end of the sleeve is tapered as at 22 for engagement with the ceiling I1. The lower portion of the sleeve subjacent the shoulder 2I is formed with a slot 23 communicating with the aperture 20 and which accommodates therein the inner end of a valve 24 threadedly carried by the rod I5 adjacent the upper end thereof. The outer end of the valve is threaded to receive an air connection whereby air may be introduced into the cylinder below the piston I4 through the bore of the rod I5 and aperture 20 The upper section of the cylinder 8 is provided with an air vent 25 to prevent compression within the cylinder above the piston I4.

Attention is directed to the fact that the cylinder is of a greater diameter than the casing, and likewise the head I 0 is of a greater diameter than the diameter of the cylinder. Furthermore, the outside diameter of the rod I5 is of such a diameter relative to the inside diameter of the casing as to provide an operating fit.

In use, dueV to the greatly increased diameter of the cylinder of the casing 5, the head engages an area of a floor of a greater diameter than would be the case if the cylinder was of a like diameter with the casing, thereby counteracting the torque transmitted to the casing from the arm and maintaining the mounting in xed position between the ceiling and floor of the drift. In operation, vair introduced into the cylinder, through the medium of the bore in the rod I5, aperture 20 in` the sleeve and valve 24, causes relative movement of the piston and cylinder and eiects a clamping of the mounting between the ceiling and bottom of the drift.

In instances where it is desired to use the mounting in wide drifts, an auxiliary sleeve 26 is employed and inserted over thermember I6 and a supplemental member 21 inserted in said sleeve to increase the length of the member I6, as clearly illustrated in Figure 3 of the drawing.

From the foregoing it will be apparent that the enlarged cylinder permits a greater force to be applied to the piston as well as providing a larger base or supporting member. For example, a 3" piston exerts 720 pounds pressure on the piston rod, a 5 piston 1960 pounds, a 6 piston 2800 pounds, an 8'.' piston 4400 pounds when supplied with a liquid under pounds pressure due to the enlarged area of the face of the piston. Tests seem to prove that a 6" piston member is required to `successfully meet and overcome the torque and twisting eiTect based on the supporting column by the conventional rock drill machines now in use, while being used out at the end of the supporting arm and opposite the supporting column. This being the case, the fact'is obvious that a column with an internal diameter of 6 inches wouldI be too heavy and large to be of use in the mining industry. The conventional size drill support has an outside diameter of approximately 31/2". Thus by enlarging the cylinder section or member of the column I am enabled to obtain my new and advantageous result.

What I claim is: v

1. A drill mounting comprising a piston rod casing, a drill supporting arm secured on said casing and adapted to adjustably accommodate a drill thereon, a cylinder secured to one end of said casing and provided with a head for engagement with a wall of a drift, a piston rod operable in said casing, a piston operable in said cylinder and connected about one end of said rod, and means carried by the other end of said rod for engaging the opposite wall of the drift, said cylinder of a larger diameter than said casing whereby as a consequence said head engages an area of said first mentioned wall of a greater diameter than said casing to counteract torque and twist transmitted to said casing from said arm to maintain the mounting in fixed position between said walls.

2. A drill mounting comprising a piston rod casing, a drill supporting arm secured on said casing and adapted to adjustably accommodate a drilll thereon, a cylinder secured to one end of said casing and provided with a head for engagement with a wall of a drift, a piston rod operable in said casing, a piston operable in said cylinder and connected about one end of said rod,

means carried by the other end of said rod for engaging the opposite wall of the drift, said cylinder of a larger diameter than said casing whereby as a consequence said head engages an area of said first mentioned wall of a greater diameter than said casing to counteract torque and twist transmitted to said casing from saidarm to maintain the mounting in xed position between said walls, and teeth carried by said head for engaging said first mentioned wall whereby to prevent relative movement therebetween.l y

3. A drill mounting comprising a piston rod casing, a drill supporting arm secured on said casing and adapted to adjustably accommodate a drill thereon, a cylinder secured to one end of said casing and provided with a head for engage'- ment with a wall of a drift, a piston rod operable in said casing, a piston operable in said cylinder and connected about one endrof said rod, and means carried by the other end of said rod for engaging the opposite wall of the drift, said cylinder of a larger diameter than said casing lfor increasing pressure on said piston rod whereby as a consequence greatly increased force is applied to said casing to counteract torque and twist transmitted to said casingV from said arm to maintain the mounting in a fixed position between 'said walls.

4. A drill mounting comprising a piston rod casing, a drill supporting arm securedV on said casing and adapted to adjustably accommodate a drill thereon, a cylinder secured to one end of said casing and provided with a head for engagement with a wall of a drift, a piston rod operable in said casing, a piston operable in said cylinder and connected about one end of said rod, means carried by the other end of said rod for engaging the opposite wall of the drift, said cylinder of a larger diameter than said'casing for increasing pressure on said piston rod whereby as aconsequence greatly increased force is applied to said casing to counteract torque and twist vtransmitted to said casing from said arm to maintain the mounting in a iixed position between said walls, and teeth carried by said head for engaging said first mentioned wall whereby to prevent relative movement therebetween.

FREDERICK A. FOWLER. 

